Roller board



FIG. 1 is a top perspective view of the roller board of the instant invention;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a front side view thereof; and,

FIG. 7 is a rear side view thereof.

The broken lines are for the purpose of illustrating portions of the article that form no part of the claim. 

CLAIM The ornamental design for a roller board, as shown and described. 